Mysql remote connections

I've an application on windows forms that needs to connect to a remote server with a static ip, however I already installed mysql on the server, provided the next command

     GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION; FLUSH PRIVILEGES;

and also put an exception in Windows Firewall, but I'm still unable to connect, I don't know if there is something else to do!, I forgot to say it is a Windows Server 2012 R2